资料来源 : pyDict

不常的,稀少的很少,不常

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Seldom \Sel"dom\, a.
   Rare; infrequent. [Archaic.] ``A suppressed and seldom
   anger.'' --Jer. Taylor.

资料来源 : WordNet®

seldom
     adv : not often; "we rarely met" [syn: {rarely}] [ant: {frequently}]